Python request.override_method函数代码示例

    def get_rendered_html_form(self, data, view, method, request):
        """
        Return a string representing a rendered HTML form, possibly bound to
        either the input or output data.

        In the absence of the View having an associated form then return None.
        """
        # See issue #2089 for refactoring this.
        serializer = getattr(data, 'serializer', None)
        if serializer and not getattr(serializer, 'many', False):
            instance = getattr(serializer, 'instance', None)
            if isinstance(instance, Page):
                instance = None
        else:
            instance = None

        # If this is valid serializer data, and the form is for the same
        # HTTP method as was used in the request then use the existing
        # serializer instance, rather than dynamically creating a new one.
        if request.method == method and serializer is not None:
            try:
                data = request.data
            except ParseError:
                data = None
            existing_serializer = serializer
        else:
            data = None
            existing_serializer = None

        with override_method(view, request, method) as request:
            if not self.show_form_for_method(view, method, request, instance):
                return

            if method in ('DELETE', 'OPTIONS'):
                return True  # Don't actually need to return a form

            if (
                not getattr(view, 'get_serializer', None)
                or not any(is_form_media_type(parser.media_type) for parser in view.parser_classes)
            ):
                return

            if existing_serializer is not None:
                serializer = existing_serializer
            else:
                if method in ('PUT', 'PATCH'):
                    serializer = view.get_serializer(instance=instance, data=data)
                else:
                    serializer = view.get_serializer(data=data)
                if data is not None:
                    serializer.is_valid()
            form_renderer = self.form_renderer_class()
            return form_renderer.render(
                serializer.data,
                self.accepted_media_type,
                dict(
                    list(self.renderer_context.items()) +
                    [('template', 'rest_framework/api_form.html')]
                )
            )

    def get_rendered_html_form(self, view, method, request):
        """
        Return a string representing a rendered HTML form, possibly bound to
        either the input or output data.

        In the absence of the View having an associated form then return None.
        """
        if request.method == method:
            data = request.DATA
            files = request.FILES
        else:
            data = None
            files = None

        with override_method(view, request, method) as request:
            obj = getattr(view, 'object', None)
            if not self.show_form_for_method(view, method, request, obj):
                return

            if method in ('DELETE', 'OPTIONS'):
                return True  # Don't actually need to return a form

            if (not getattr(view, 'get_serializer', None)
                or not any(is_form_media_type(parser.media_type) for parser in view.parser_classes)):
                return

            serializer = view.get_serializer(instance=obj, data=data, files=files)
            serializer.is_valid()
            data = serializer.data

            form_renderer = self.form_renderer_class()
            return form_renderer.render(data, self.accepted_media_type, self.renderer_context)

    def test_action_reflect_http_method(self):
        request = self.factory.get()

        view = self.view_class()
        view.action_map = {'get': 'retrieve'}

        # reproduce DRF wrapping
        with override_method(view, Request(request), 'GET') as request:
            view.dispatch(request)
            self.assertEqual(view.action, 'retrieve')

    def get_rendered_html_form(self, data, view, method, request):
        old_serializer = getattr(data, 'serializer', None)
        if old_serializer and not getattr(old_serializer, 'many', False):
            instance = getattr(old_serializer, 'instance', None)
            if isinstance(instance, Page):
                instance = None
        else:
            instance = None

        if request.method == method and old_serializer is not None:
            try:
                kwargs = {'data': request.data}
            except ParseError:
                kwargs = {}
        else:
            kwargs = {}

        with override_method(view, request, method) as request:
            if not self.show_form_for_method(view, method, request, instance):
                return

            if method in ('DELETE', 'OPTIONS'):
                return True  # Don't actually need to return a form

            has_serializer = getattr(view, 'get_serializer', None)

            if (
                (not has_serializer) or
                not any(is_form_media_type(parser.media_type) for parser in view.parser_classes)
            ):
                return

            if has_serializer:
                if method in ('PUT', 'PATCH'):
                    serializer = view.get_serializer(instance=instance, method=method, **kwargs)
                else:
                    try:
                        serializer = view.get_serializer(method=method, **kwargs)
                    except TypeError:
                        serializer = view.get_serializer(**kwargs)
            else:
                # at this point we must have a serializer_class
                if method in ('PUT', 'PATCH'):
                    serializer = self._get_serializer(view.serializer_class, view,
                                                      request, instance=instance, **kwargs)
                else:
                    serializer = self._get_serializer(view.serializer_class, view,
                                                      request, **kwargs)

            return self.render_form_for_serializer(serializer)

    def get_rendered_html_form(self, data, view, method, request):
        """
        Return a string representing a rendered HTML form, possibly bound to
        either the input or output data.

        In the absence of the View having an associated form then return None.
        """
        # See issue #2089 for refactoring this.
        serializer = getattr(data, 'serializer', None)
        if serializer and not getattr(serializer, 'many', False):
            instance = getattr(serializer, 'instance', None)
        else:
            instance = None

        if request.method == method:
            try:
                data = request.data
            except ParseError:
                data = None
            existing_serializer = serializer
        else:
            data = None
            existing_serializer = None

        with override_method(view, request, method) as request:
            if not self.show_form_for_method(view, method, request, instance):
                return

            if method in ('DELETE', 'OPTIONS'):
                return True  # Don't actually need to return a form

            if (
                not getattr(view, 'get_serializer', None)
                or not any(is_form_media_type(parser.media_type) for parser in view.parser_classes)
            ):
                return

            if existing_serializer is not None:
                serializer = existing_serializer
            else:
                if method in ('PUT', 'PATCH'):
                    serializer = view.get_serializer(instance=instance, data=data)
                else:
                    serializer = view.get_serializer(data=data)
                if data is not None:
                    serializer.is_valid()
            form_renderer = self.form_renderer_class()
            return form_renderer.render(serializer.data, self.accepted_media_type, self.renderer_context)

    def get_raw_data_form(self, data, view, method, request):
        """
        Returns a form that allows for arbitrary content types to be tunneled
        via standard HTML forms.
        (Which are typically application/x-www-form-urlencoded)

        Modifications: Set content to None so this doesn't bombard the database
        """
        # See issue #2089 for refactoring this.
        serializer = getattr(data, 'serializer', None)
        if serializer and not getattr(serializer, 'many', False):
            instance = getattr(serializer, 'instance', None)
            if isinstance(instance, Page):
                instance = None
        else:
            instance = None

        with override_method(view, request, method) as request:
            # Check permissions
            if not self.show_form_for_method(view, method, request, instance):
                return

            content = None

            # Generate a generic form that includes a content type field,
            # and a content field.
            media_types = [parser.media_type for parser in view.parser_classes]
            choices = [(media_type, media_type) for media_type in media_types]
            initial = media_types[0]

            class GenericContentForm(forms.Form):
                _content_type = forms.ChoiceField(
                    label='Media type',
                    choices=choices,
                    initial=initial,
                    widget=forms.Select(attrs={'data-override': 'content-type'})
                )
                _content = forms.CharField(
                    label='Content',
                    widget=forms.Textarea(attrs={'data-override': 'content'}),
                    initial=content
                )

            return GenericContentForm()

    def render(self, data, accepted_media_type=None, renderer_context=None):
        self.accepted_media_type = accepted_media_type or ''
        self.renderer_context = renderer_context or {}

        response = renderer_context['response']
        request = renderer_context['request']
        view = self.renderer_context['view']

        if response.status_code == status.HTTP_400_BAD_REQUEST:
            # Errors still need to display the list or detail information.
            # The only way we can get at that is to simulate a GET request.
            self.error_form = self.get_rendered_html_form(data, view, request.method, request)
            self.error_title = {'POST': 'Create', 'PUT': 'Edit'}.get(request.method, 'Errors')

            with override_method(view, request, 'GET') as request:
                response = view.get(request, *view.args, **view.kwargs)
            data = response.data

        template = loader.get_template(self.template)
        context = self.get_context(data, accepted_media_type, renderer_context)
        context = RequestContext(renderer_context['request'], context)
        ret = template.render(context)

        # Creation and deletion should use redirects in the admin style.
        if (response.status_code == status.HTTP_201_CREATED) and ('Location' in response):
            response.status_code = status.HTTP_302_FOUND
            response['Location'] = request.build_absolute_uri()
            ret = ''

        if response.status_code == status.HTTP_204_NO_CONTENT:
            response.status_code = status.HTTP_302_FOUND
            try:
                # Attempt to get the parent breadcrumb URL.
                response['Location'] = self.get_breadcrumbs(request)[-2][1]
            except KeyError:
                # Otherwise reload current URL to get a 'Not Found' page.
                response['Location'] = request.full_path
            ret = ''

        return ret

    def get_raw_data_form(self, data, view, method, request):
        """
        Returns a form that allows for arbitrary content types to be tunneled
        via standard HTML forms.
        (Which are typically application/x-www-form-urlencoded)
        """
        # See issue #2089 for refactoring this.
        serializer = getattr(data, 'serializer', None)
        if serializer and not getattr(serializer, 'many', False):
            instance = getattr(serializer, 'instance', None)
            if isinstance(instance, Page):
                instance = None
        else:
            instance = None

        with override_method(view, request, method) as request:
            # Check permissions
            if not self.show_form_for_method(view, method, request, instance):
                return

            # If possible, serialize the initial content for the generic form
            default_parser = view.parser_classes[0]
            renderer_class = getattr(default_parser, 'renderer_class', None)
            if (hasattr(view, 'get_serializer') and renderer_class):
                # View has a serializer defined and parser class has a
                # corresponding renderer that can be used to render the data.

                if method in ('PUT', 'PATCH'):
                    serializer = view.get_serializer(instance=instance)
                else:
                    serializer = view.get_serializer()

                # Render the raw data content
                renderer = renderer_class()
                accepted = self.accepted_media_type
                context = self.renderer_context.copy()
                context['indent'] = 4
                content = renderer.render(serializer.data, accepted, context)
            else:
                content = None

            # Generate a generic form that includes a content type field,
            # and a content field.
            media_types = [parser.media_type for parser in view.parser_classes]
            choices = [(media_type, media_type) for media_type in media_types]
            initial = media_types[0]

            class GenericContentForm(forms.Form):
                _content_type = forms.ChoiceField(
                    label='Media type',
                    choices=choices,
                    initial=initial,
                    widget=forms.Select(attrs={'data-override': 'content-type'})
                )
                _content = forms.CharField(
                    label='Content',
                    widget=forms.Textarea(attrs={'data-override': 'content'}),
                    initial=content
                )

            return GenericContentForm()

    def get_rendered_html_form(self, data, view, method, request):
        """
        Return a string representing a rendered HTML form, possibly bound to
        either the input or output data.

        In the absence of the View having an associated form then return None.
        """
        # See issue #2089 for refactoring this.
        serializer = getattr(data, 'serializer', None)
        if serializer and not getattr(serializer, 'many', False):
            instance = getattr(serializer, 'instance', None)
            if isinstance(instance, Page):
                instance = None
        else:
            instance = None

        # If this is valid serializer data, and the form is for the same
        # HTTP method as was used in the request then use the existing
        # serializer instance, rather than dynamically creating a new one.
        if request.method == method and serializer is not None:
            try:
                kwargs = {'data': request.data}
            except ParseError:
                kwargs = {}
            existing_serializer = serializer
        else:
            kwargs = {}
            existing_serializer = None

        with override_method(view, request, method) as request:
            if not self.show_form_for_method(view, method, request, instance):
                return

            if method in ('DELETE', 'OPTIONS'):
                return True  # Don't actually need to return a form

            has_serializer = getattr(view, 'get_serializer', None)
            has_serializer_class = getattr(view, 'serializer_class', None)

            if (
                (not has_serializer and not has_serializer_class) or
                not any(is_form_media_type(parser.media_type) for parser in view.parser_classes)
            ):
                return

            if existing_serializer is not None:
                serializer = existing_serializer
            else:
                if has_serializer:
                    if method in ('PUT', 'PATCH'):
                        serializer = view.get_serializer(instance=instance, **kwargs)
                    else:
                        serializer = view.get_serializer(**kwargs)
                else:
                    # at this point we must have a serializer_class
                    if method in ('PUT', 'PATCH'):
                        serializer = self._get_serializer(view.serializer_class, view,
                                                          request, instance=instance, **kwargs)
                    else:
                        serializer = self._get_serializer(view.serializer_class, view,
                                                          request, **kwargs)

            if hasattr(serializer, 'initial_data'):
                serializer.is_valid()

            form_renderer = self.form_renderer_class()
            return form_renderer.render(
                serializer.data,
                self.accepted_media_type,
                {'style': {'template_pack': 'rest_framework/horizontal'}}
            )

    def get_raw_data_form(self, data, view, method, request):
        """
        Returns a form that allows for arbitrary content types to be tunneled
        via standard HTML forms.
        (Which are typically application/x-www-form-urlencoded)
        """
        # See issue #2089 for refactoring this.
        serializer = getattr(data, 'serializer', None)
        if serializer and not getattr(serializer, 'many', False):
            instance = getattr(serializer, 'instance', None)
            if isinstance(instance, Page):
                instance = None
        else:
            instance = None

        with override_method(view, request, method) as request:
            # If we're not using content overloading there's no point in
            # supplying a generic form, as the view won't treat the form's
            # value as the content of the request.
            if not (api_settings.FORM_CONTENT_OVERRIDE and
                    api_settings.FORM_CONTENTTYPE_OVERRIDE):
                return None

            # Check permissions
            if not self.show_form_for_method(view, method, request, instance):
                return

            # If possible, serialize the initial content for the generic form
            default_parser = view.parser_classes[0]
            renderer_class = getattr(default_parser, 'renderer_class', None)
            if (hasattr(view, 'get_serializer') and renderer_class):
                # View has a serializer defined and parser class has a
                # corresponding renderer that can be used to render the data.

                if method in ('PUT', 'PATCH'):
                    serializer = view.get_serializer(instance=instance)
                else:
                    serializer = view.get_serializer()

                # Render the raw data content
                renderer = renderer_class()
                accepted = self.accepted_media_type
                context = self.renderer_context.copy()
                context['indent'] = 4
                content = renderer.render(serializer.data, accepted, context)
            else:
                content = None

            # Generate a generic form that includes a content type field,
            # and a content field.
            content_type_field = api_settings.FORM_CONTENTTYPE_OVERRIDE
            content_field = api_settings.FORM_CONTENT_OVERRIDE

            media_types = [parser.media_type for parser in view.parser_classes]
            choices = [(media_type, media_type) for media_type in media_types]
            initial = media_types[0]

            # NB. http://jacobian.org/writing/dynamic-form-generation/
            class GenericContentForm(forms.Form):
                def __init__(self):
                    super(GenericContentForm, self).__init__()

                    self.fields[content_type_field] = forms.ChoiceField(
                        label='Media type',
                        choices=choices,
                        initial=initial
                    )
                    self.fields[content_field] = forms.CharField(
                        label='Content',
                        widget=forms.Textarea,
                        initial=content
                    )

            return GenericContentForm()

    def get_raw_data_form(self, view, method, request):
        """
        Returns a form that allows for arbitrary content types to be tunneled
        via standard HTML forms.
        (Which are typically application/x-www-form-urlencoded)
        """
        with override_method(view, request, method) as request:
            # If we're not using content overloading there's no point in
            # supplying a generic form, as the view won't treat the form's
            # value as the content of the request.
            if not (api_settings.FORM_CONTENT_OVERRIDE and api_settings.FORM_CONTENTTYPE_OVERRIDE):
                return None

            # Check permissions
            obj = getattr(view, "object", None)
            if not self.show_form_for_method(view, method, request, obj):
                return

            # If possible, serialize the initial content for the generic form
            default_parser = view.parser_classes[0]
            renderer_class = getattr(default_parser, "renderer_class", None)
            if hasattr(view, "get_serializer") and renderer_class:
                # View has a serializer defined and parser class has a
                # corresponding renderer that can be used to render the data.

                # Get a read-only version of the serializer
                serializer = view.get_serializer(instance=obj)
                if obj is None:
                    for name, field in serializer.fields.items():
                        if getattr(field, "read_only", None):
                            del serializer.fields[name]

                # Render the raw data content
                renderer = renderer_class()
                accepted = self.accepted_media_type
                context = self.renderer_context.copy()
                context["indent"] = 4
                content = renderer.render(serializer.data, accepted, context)
            else:
                content = None

            # Generate a generic form that includes a content type field,
            # and a content field.
            content_type_field = api_settings.FORM_CONTENTTYPE_OVERRIDE
            content_field = api_settings.FORM_CONTENT_OVERRIDE

            media_types = [parser.media_type for parser in view.parser_classes]
            choices = [(media_type, media_type) for media_type in media_types]
            initial = media_types[0]

            # NB. http://jacobian.org/writing/dynamic-form-generation/
            class GenericContentForm(forms.Form):
                def __init__(self):
                    super(GenericContentForm, self).__init__()

                    self.fields[content_type_field] = forms.ChoiceField(
                        label="Media type", choices=choices, initial=initial
                    )
                    self.fields[content_field] = forms.CharField(
                        label="Content", widget=forms.Textarea, initial=content
                    )

            return GenericContentForm()

    def get_rendered_html_form(self, data, view, method, request):
        """
        Return a string representing a rendered HTML form, possibly bound to
        either the input or output data.

        In the absence of the View having an associated form then return None.
        """
        # See issue #2089 for refactoring this.
        serializer = getattr(data, "serializer", None)
        if serializer and not getattr(serializer, "many", False):
            instance = getattr(serializer, "instance", None)
            if isinstance(instance, Page):
                instance = None
        else:
            instance = None

        # If this is valid serializer data, and the form is for the same
        # HTTP method as was used in the request then use the existing
        # serializer instance, rather than dynamically creating a new one.
        if request.method == method and serializer is not None:
            try:
                kwargs = {"data": request.data}
            except ParseError:
                kwargs = {}
            existing_serializer = serializer
        else:
            kwargs = {}
            existing_serializer = None

        with override_method(view, request, method) as request:
            if not self.show_form_for_method(view, method, request, instance):
                return

            if method in ("DELETE", "OPTIONS"):
                return True  # Don't actually need to return a form

            has_serializer = getattr(view, "get_serializer", None)
            has_serializer_class = getattr(view, "serializer_class", None)

            if (not has_serializer and not has_serializer_class) or not any(
                is_form_media_type(parser.media_type) for parser in view.parser_classes
            ):
                return

            if existing_serializer is not None:
                serializer = existing_serializer
            else:
                if has_serializer:
                    if method in ("PUT", "PATCH"):
                        serializer = view.get_serializer(instance=instance, **kwargs)
                    else:
                        serializer = view.get_serializer(**kwargs)
                else:
                    # at this point we must have a serializer_class
                    if method in ("PUT", "PATCH"):
                        serializer = self._get_serializer(
                            view.serializer_class, view, request, instance=instance, **kwargs
                        )
                    else:
                        serializer = self._get_serializer(view.serializer_class, view, request, **kwargs)

            if hasattr(serializer, "initial_data"):
                serializer.is_valid()

            form_renderer = self.form_renderer_class()
            return form_renderer.render(
                serializer.data,
                self.accepted_media_type,
                dict(list(self.renderer_context.items()) + [("template", "rest_framework/api_form.html")]),
            )